/**
 * Copyright (c) 2016 DeepCortex GmbH <legal@eventql.io>
 * Authors:
 *   - Paul Asmuth <paul@eventql.io>
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License ("the license") as
 * published by the Free Software Foundation, either version 3 of the License,
 * or any later version.
 *
 * In accordance with Section 7(e) of the license, the licensing of the Program
 * under the license does not imply a trademark license. Therefore any rights,
 * title and interest in our trademarks remain entirely with us.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the license for more details.
 *
 * You can be released from the requirements of the license by purchasing a
 * commercial license. Buying such a license is mandatory as soon as you develop
 * commercial activities involving this program without disclosing the source
 * code of your own applications
 */
#pragma once
#include "eventql/eventql.h"
#include <eventql/util/stdtypes.h>
#include <eventql/util/autoref.h>
#include <eventql/sql/qtree/ValueExpressionNode.h>
#include <eventql/sql/qtree/CallExpressionNode.h>
#include <eventql/sql/qtree/ColumnReferenceNode.h>
#include <eventql/sql/qtree/SequentialScanNode.h>
#include <eventql/sql/qtree/JoinNode.h>
#include <eventql/sql/transaction.h>

namespace csql {

/**
 * Finds "join conjunctions". A join conjunction is a predicate expression
 * that implies a logical relation (equal/less than/greather than) between
 * columns (or projections of columns) of the two input tables of the join.
 */
void findJoinConjunctions(
    const JoinNode* join,
    const ValueExpressionNode* expr,
    std::vector<JoinConjunction>* conjunctions);

/**
 * Checks on which input tables a given expression's output depends
 */
void findJoinInputDependencies(
    const JoinNode* join,
    const ValueExpressionNode* expr,
    std::set<size_t>* tables);


} // namespace csql

